Meet The Sales Team

Bill Ferrero

Business Development & Recycle Coordination

Bill has been with Cal-Waste for over 30 years after managing a retail music store in Stockton and touring with his band for eleven years.  To him, his responsibilities carry more weight than the title of Sales Manager; his goal is to pass on his wealth of knowledge through structured sales training methods that have proven successful over the years.  He claims to owe much of his success to the relationships he has developed with customers.  When it comes to motivating his team, Bill leads by example, sharing knowledge and experiences from his years in the industry.  Outside of his role at Cal-Waste Bill enjoys writing and playing music with his friends and family, or guiding fishing trips in the Central Valley.

Colleen Kamerer

Business Development & Recycle Coordination

Colleen has worked at Cal-Waste for 26 years, mostly in the capacity of sales and sales support.  Being an active member in the Delta Chamber of Commerce, she is attuned to businesses’ needs in the Delta, as well as San Joaquin County and Sacramento County.

Maria Guadarrama


Maria has been with Cal-Waste for 4 years, and she pulls from years of experience providing customer service support here and elsewhere in the waste industry.  Her years as a customer service representative have lead her to become an expert in helping customers receive the exact solutions tailored to their needs.